#OnThisDay in 1963 #TheLegionOfSubstituteHeroes debuted in @dc.com #AdventureComics #306 #PolarBoy #NightGirl #StoneBoy #FireLad #ChlorophyllKid #5RejectedLegionOfSuperHeroesApplicantsWhoBandTogether in #The30thCentury #toRightAnyWrongsTheMainTeamMightMiss without much luck til meeting #ThePlantMen